I've only seen The Beyond before so I look forward to the rest. I've been criminally behind on Argento (only seen Suspiria & Tenebrae + pelts).

Then it's even more of a shame you'll have to experience them through Arrow's shoddy transfers. Hands-down, one of the worst 'premiere' Hi-Def distributors doing it today. Consumers really need to stop supporting them so heavily.

Blue Underground:

Arrow:

And to be honest, despite the strange yellow/olive tinge, Deep Red is legitimately one of their better efforts as it doesn't sport(until the end that is) one of their more obnoxious trademarks: unnecessary lightening of the picture at hand IE: the 'soap opera' effect.